package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Autowired(required = false)
    private SystemUserMapper systemUserMapper;

    @Override
    public CaptchaVo getCaptcha() {
        // 创建图片对象
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 5);
        // 获取验证码文本
        String verCode = specCaptcha.text().toLowerCase();
        // redis保存 verCode验证码
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID();
        stringRedisTemplate.opsForValue().set(key, verCode, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        // 将图形验证码和 redis保存验证码的 key进行封装
        return new CaptchaVo(specCaptcha.toBase64(), key);
    }

    @Override
    public String login(LoginVo loginVo) {
        // 获取用户输入的验证码
        String captchaCode = loginVo.getCaptchaCode();

        if (!StringUtils.hasText(captchaCode)) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }

        // 获取 redis保存的验证码
        String redisCode = stringRedisTemplate.opsForValue().get(loginVo.getCaptchaKey());

        // 比较验证码
        if (redisCode == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        if (!captchaCode.equals(redisCode)) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }

        // 判断账号是否存在
        SystemUser systemUser = systemUserMapper.selectOne(new LambdaQueryWrapper<SystemUser>()
                .eq(SystemUser::getUsername, loginVo.getUsername()));
        if (systemUser == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        // 判断账号是否禁用
        if (systemUser.getStatus() == BaseStatus.DISABLE) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        // 判断密码是否正确
        if (!DigestUtils.md5Hex(loginVo.getPassword()).equals(systemUser.getPassword())) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        // 登入成功，生成token
        String token = JwtUtil.createToken(systemUser.getUsername(), systemUser.getId());

        return token;
    }
}
